i'm a new again distributor , sounds like you should be able to get a quanity discount.you can dilute it 5 or 7 to 1 and do a good job the price per gal should be liveable . e mail me maby i can help
i use chlorine on decks too, when they are grey . they come out fine. and it's cheap.but my chlorine(15%) cost over 3.00/gal.
sus mckenzie
sudsmck@aol.com